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Lift-drag combined vertical axis wind turbine

A wind turbine and vertical axis technology, which is applied in the field of lift-drag combined vertical axis wind turbines, can solve the problems of increasing structural complexity and weight, the inability of lift blades to provide effective lift, and reducing wind energy utilization. The effect of reducing dependencies and increasing utilization

Pending Publication Date: 2017-11-17
GUANGZHOU HKUST FOK YING TUNG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the lift-drag combined fan with H-shaped straight blades and S-shaped semicircular blades solves the self-starting problem of the fan to a certain extent, due to the large difference in the tip speed ratio of the two types of blades under the best operating conditions, the low Lifting blades cannot provide effective lift under wind speed conditions, and increase structural complexity and weight, making it require a larger starting torque than single-resistance wind turbines. resistance, reducing its wind energy utilization

Method used

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  • Lift-drag combined vertical axis wind turbine
  • Lift-drag combined vertical axis wind turbine
  • Lift-drag combined vertical axis wind turbine

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Embodiment Construction

[0035] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0036] Such as figure 1 As shown, a lift-drag combined vertical axis wind turbine according to the present invention includes a shaft 1, an inner rotation mechanism, an outer rotation mechanism, inner blades 2 and outer blades 3 that rotate around the axial direction of the shaft 1.

[0037] Such as Figure 1-3 As shown, the shape of the inner blade 2 is an arc cylindrical shape, the upper end and the lower end of the inner blade 2 are twisted, and the shape of the cross section of the inner blade 2 is a semicircular arc; the shape of the outer blade 3 is an elongated sheet, and It is a C-shaped spiral around the shaft 1, and the shape of the cross-section of the o...

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Abstract

The invention discloses a lift-drag combined vertical axis wind turbine. The lift-drag combined vertical axis wind turbine comprises a shaft rod, an inner rotating mechanism, an outer rotating mechanism, and an inner blade and an outer blade which rotate in the axis direction of the shaft rod; the inner blade and the outer blade both adopt twisting blades; each cross section of the outer blade is consistent in shape and size; an included angle between the radial direction of the chord line middle point of the outer blade and the radial direction of the end part of the inner blade is a staggered angle; on any cross section of the wind turbine, the size of the staggered angle is consistent; the inner blade is rotationally connected with the shaft rod through the inner rotating mechanism; and the outer blade is rotationally connected with the shaft rod through the outer rotating mechanism. The lift-drag combined vertical axis wind turbine can be started with lower torque, and achieves higher wind energy utilization rate.

Description

technical field [0001] The invention belongs to the technical field of wind turbines, and relates to a lift-drag combined vertical axis wind turbine. Background technique [0002] With the increasing consumption of fossil fuels and the increasing emphasis on environmental issues, how to develop and utilize renewable energy is an important issue for countries all over the world. Among them, wind energy has become an important part of the renewable energy landscape due to its large reserves, wide distribution and relatively mature development technology. [0003] The capture and utilization of wind energy is mainly through the wind energy receiving device of the wind turbine. According to the arrangement of the rotation axis of the wind turbine relative to the airflow direction, the wind turbine can be divided into horizontal axis wind turbines and vertical axis wind turbines. Existing vertical axis wind turbines mainly include three types: lift type, drag type, and lift-drag...

Claims

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Application Information

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IPC IPC(8): F03D3/06
CPCF03D3/061F03D3/062Y02E10/74
Inventor 吴池力陈宇明欧宝星张骏升
Owner GUANGZHOU HKUST FOK YING TUNG RES INST
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